qemu: Wrap controllers code into dummy loop
qemu: Wrap controllers code into dummy loop

https://bugzilla.redhat.com/show_bug.cgi?id=870003

which just re-indent code and prepare it for next patch.
(cherry picked from commit 77b93dbc3e5fdffec60f631cd52c4dba0f2e0f29)

mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2